$ git clone -n https://src.fedoraproject.org/rpms/rust-libbz2-rs-sys.git /var/lib/mock/f45-build-42906-797/root/chroot_tmpdir/scmroot/rust-libbz2-rs-sys
Cloning into '/var/lib/mock/f45-build-42906-797/root/chroot_tmpdir/scmroot/rust-libbz2-rs-sys'...
$ git fetch origin 1857c9c3ee4533a337d7d924f5748e41d3d95775:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libbz2-rs-sys
 * [new ref]         1857c9c3ee4533a337d7d924f5748e41d3d95775 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1857c9c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild